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 <p>While the client and servers are disconnected, their operation varies depending on the circumstances.</p>

 <h2 id="normal-disconnect"><a id="concept_915EAD135DD942F28A38513097ACB1F1__section_6AB8F4B8993F4EF9B32A93A100F07BEC" class="no-quick-link"></a>Normal disconnect</h2>

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 <p>If requested, the servers maintain the queues and durable interest list until the client reconnects or times out. The non-durable interest list is discarded. The servers continue to queue up incoming messages for entries on the durable interest list. All messages that were in the queue when the client disconnected remain in the queue, including messages for entries on the non-durable list.</p>

 <p>If the client requests to not have its subscriptions maintained, or if there are no durable subscriptions, the servers unregister the client and perform the same cleanup as for a non-durable client.</p>

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 <p>The servers track how long to keep a durable client queue alive based on the <code>durable-client-timeout</code> setting. If the client remains disconnected longer than the timeout, the servers unregister the client and do the same cleanup that is performed for a non-durable client. The servers also log an alert. When a timed-out client reconnects, the servers treat it as a new client making its initial connection.</p>


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	<p>While the client and servers are disconnected, their operation varies depending on the circumstances.</p>

	<h2 id="normal-disconnect"><a id="concept_915EAD135DD942F28A38513097ACB1F1__section_6AB8F4B8993F4EF9B32A93A100F07BEC" class="no-quick-link"></a>Normal disconnect</h2>

	<p>When a durable client disconnects normally, the <code>Cache.close</code> request states whether to maintain the client’s message queue and durable subscriptions. The servers stop sending messages to the client and release its connection. See <a href="/docs/geode-native/cpp/113/preserving-data/disconnecting-from-server.html#concept_3A9AC62F96FA44DBBB5CCBFD3EA19B56">Disconnecting From the Server</a> for more information.</p>

	<p>If requested, the servers maintain the queues and durable interest list until the client reconnects or times out. The non-durable interest list is discarded. The servers continue to queue up incoming messages for entries on the durable interest list. All messages that were in the queue when the client disconnected remain in the queue, including messages for entries on the non-durable list.</p>

	<p>If the client requests to not have its subscriptions maintained, or if there are no durable subscriptions, the servers unregister the client and perform the same cleanup as for a non-durable client.</p>

	<h2 id="abnormal-disconnect">Abnormal disconnect</h2>

	<p>If the client crashes or loses its connections to all servers, the servers automatically maintain its message queue and durable subscriptions until the client reconnects or times out.</p>

	<h2 id="client-disconnected-but-operational">Client disconnected but operational</h2>

	<p>If the client operates while it is disconnected, it gets what data it can from the local cache. Since updates are not allowed, the data can become stale. An <code>UnconnectedException</code> occurs if an update is attempted.</p>

	<h2 id="timing-out-while-disconnected">Timing out while disconnected</h2>

	<p>The servers track how long to keep a durable client queue alive based on the <code>durable-client-timeout</code> setting. If the client remains disconnected longer than the timeout, the servers unregister the client and do the same cleanup that is performed for a non-durable client. The servers also log an alert. When a timed-out client reconnects, the servers treat it as a new client making its initial connection.</p>



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